Checks whether background is defined in IME extension manifest. And also move KeyEventDone logic fr…

chrome/browser/chromeos/input_method/input_method_engine.cc

Index: chrome/browser/chromeos/input_method/input_method_engine.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_engine.cc b/chrome/browser/chromeos/input_method/input_method_engine.cc
index f8e6c87c2a7c62574540005b918cc4cc467b112f..540766af3629248b50864396817c5231ad3d6c5e 100644
--- a/chrome/browser/chromeos/input_method/input_method_engine.cc
+++ b/chrome/browser/chromeos/input_method/input_method_engine.cc
@@ -470,14 +470,6 @@ bool InputMethodEngine::IsActive() const {
   return active_;
 }
 
-void InputMethodEngine::KeyEventDone(input_method::KeyEventHandle* key_data,
-                                     bool handled) {
-  KeyEventDoneCallback* callback =
-      reinterpret_cast<KeyEventDoneCallback*>(key_data);
-  callback->Run(handled);
-  delete callback;
-}
-
 bool InputMethodEngine::DeleteSurroundingText(int context_id,
                                               int offset,
                                               size_t number_of_chars,